AMBROSE (Saint) (November 2) (6th century) The Abbot of a monastery near Lyons, afterwards promoted to the headship of the great Abbey of Agaune, or Saint Moritz, in Switzerland. He was singularly zealous in regard to the due and complete celebration of the Church services, and especially for the continuous Psalmody, day and night, proper to certain exceptionally austere Religious Houses. He died about A.D. 516, and was buried in his Abbey Church.